Stoker.



. STINBMANn W.H.H

STOKER.

APPLICATION FILED 213.12, 1912.

'Patented July 9, 1912.

LSQJQB 3 SHEETS-SHEET 1.

CEMOWLQQ W. H. H. STINEMAN.

STOKER.

APPLICATION FILED Pmmz, 14912.

LSQ 6@U Patented July 9, 1912.

3 SHEETS-SHEET 2.

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W. H. H. STINBMAN.

STOKER.

. APPLIGATION FILED 1113.12, 1912. p Patented July 9, w12.

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flights of the conveyer toward the rear end nutren enanas @Parnu ernten.

WILLIAM H. H. STINMAN, OF BALTIMORE, MARYLAND, ASSIGNOR OF UNE-THIRD T0 ARTHUR WEGEFARTE, 0F BALTIMORE, MARYLAND.

STOKER.

Specification of Letters Patent.

Patented July i9?, Mul?.

To all 'whom t may concern:

Be it known that LWILLLAM H. l-l. STINE- MAN, a citizen of the United States, residing at Baltimore, in the State of Maryland, have vinvented certain new and useful llmprovements in Stokers, of'which the following is a specification.

My invention relates to improvements in stokers and especially to that class in which the fuel is fed from the bottom of the furnace to the under side of the fire.' ln this class of devices the greatest efficiency and extent of fire surface are obtained, by providing a graduated fuel conveyer, by means of which a portion of the fuel will be forced out of the magazine throughout its entire length, so that an equal distribution of the fuel will be accomplished. By graduatingl the feed device along the length of the firebox inthe direction of the feed, the fuel will be distributed and deposited along the length of the irebox under the tire in even quantities to maint-ain a uniform supply throughout the area thereof.` i

The object of the invention is to provide a ,graduated conveyer to reduce the carrying capacity thereof toward the rear of the fire- .boX, and to decrease the spaces between the thereof, thereby increasing the lifting capacity of the graduated flights, whereby a uniform distribution ofthe fuel in the firebox will be maintained. And further to provide a graduated magazine, or magazines, each having a uniform outlet to the fire-box and spiral shaped grooves or corrugations beginning near one side of said outlet and increasing in depth and terminatingat the opposite side of the said outlet, the width of said grooves or corrugations decrease toward the rear end of the magazines to correspond to the decreased spaces between the dights of the conveyeri, whereby a large portion ofthe fuel between each ight of the conveyer will be held ln'said grooves or corrugations and carried, lor

lifted up, through' the outlet ofthe maga-l zine tothe lire-box, thus preventing choking V of the said conveyers and greatly reducing the power necessary to operate same. Also to provide means near the front end ,of the conveyers to cut od, entirely, or partly, the travel of the fuel toward the rear end of the conveyers, whereby the fuel will be forced up more freely at the front end of the fire boxwhen desired.

My invention consists of the novelconstruction and arrangement of the parts and combination of parts hereinafter more fully 'set forth in thev following specification and vertical sectional view of one of the magazines and conveyors on the line X-X of Fig. 1.? Fig. 5 is a similar view to Fig. 2, with the fire-grate removed. IFig. 6 lis an enlarged detailed @plan view, partly broken away, of the lower sect-ion of one of the magazines showing the' spiral grooves or corrugations. Fig. 7 is an inverted plan view, partly broken away, of the upper sec-` tion of one of the magazines, also showing the spiral grooves or corrugations. Fig. 8 is a det-ail rear view of the cut-ods and their connecting rod for operating same.

Referring to the accompanying drawings, forming part oft-his specification, and in which like reference numerals designate like parts throughout the several views thereof, l designates a cylindrical cone-shaped magazine projecting through the front wall of the furnace and supported at its rear end by the support 2. lin the present instance two magazinesl and conveyers ,are employed, both of which are identical in construction and operation, and shown applied toa locomotive. 'llhese magazines 1 are constructed of two sections bolted together at 3; the upper section being provided with a uniform outlet t having a channel 5 extending around the entire upper edge thereof, and into which the fire-bricks 6 are tted. rllhe Fig. 2 is a plan view of the lire-box,

grate 7 has-its upper surface Hush with the y upper surface of the channel 5. llt will be seen that by having the channel 5 around the entire-edge of the outlet 4t, it is not necessary to-fastenthel bricks` 6 in place and they can readily he. removed and new ones inserted .when desired. These magazines l .are also provided with spiral grooves or corrugations 8 which begin at a point near one lside of the outlet 4l and gradually increase-in depth and .terminate in their great JQ i v 1,032,164

est ydepth at the other side of the outlet 4. The grooves or corrugations 8 decrease in width toward the rear end of the magazines,

the purpose of which will be hereinafter set forth.

The conveyers 9 have their front l ends journaled in the wall of the hopper 10 and are straight or uniform in size back to the inner surface of the fire-'boxfat which point they begin to taper to the rear end thereof, resting mand conforming to the cone shape of magazinesl, thus reducing the carrying capacity toward the rear lof the fire-box. The flights of the lconveyer not only decrease in size, butthe spaces between the iights decrease toward the rear thereof to conform to the width of the grooves or cor-l rugations 8, whereby the conveyers are given greater lifting power and a uniform feeding of the fuel tothe fire-box is obtained The tendency' of a screw conveyer is to carry vthe fuelto the rear of the {ire-box and to choke the conveyer; The grooves ofi-'corrugations, 8 will prevent the choking of the conveyer" by holding a greater portion of the fuel. therein while the conveyer lforces it up and. discharges it through the outlet 4 to the fire-box, thus preventing Vtoo much of the fuel fronybeing carried to the rear of the magazine and choking the conveyer, thereby greatly reducing the-power necessary to operate the said conveyers. These grooves or corrugations `8 are spiral shaped to correspond to the spiral `shape of the flights of the conveyer, and increase in depth toward'A their discharge ends,\or in the direction o f the revolution of the conveyer, thereby increasing the space on thel discharge side-of .thefconveyen thus preventing choking of the conveyers and assuring a free discharge of the fuel to the fire-box.

At the front of the magazines 1 is arranged a hop er 1.0 communicating therewith,and having a neckfll into which the fuel, front ends of the conveyers extend, the said hop er 10 being slightly flared at its mouth. his hopper'lO 1n the present. in-

stance is just under the firemansf deck 12.

The lfuel is fed from the tender 13 to the hopper 10 by means of the conveyers 14 and 15, the former rbeing under the vfiremans l j deck and the latter on the `tender 13. From the hoppery 10- the fuel is carriedv into vthe magazines 1 by the conveyers 9 and forced j up throughthe outlet 4 to the fire-box ,formly throughout its entire'length. In the bottom of the hopper 10 are two plungers 16 which are loperated in and out between Y' the flights of the conveyers and hold the fuel `plungers 16 are operated by the leversA 17` 'connected to one 'end thereof and journaled.

vagainst any backward movement and'cause it to move forward in the magazines. These inthe bearing 18 and having their other ends 'pivoted 'to one end of the eccentric `rods 19, which latter are mounted on the gear wheels 20, which latter are fast on the ends of the conveyers 1, 1.' At the front ends of the magazines 1 are cut-ois 21 adapted to operate in and outof the magazines between the flights of the conveyers to cut off entirely, or partly, the travel ofthe fuel toward the rear of themagazines and cause it to feed up through the outlet at-the front of the fire-box when it isdesired to feed the fuel more freely at this point. These cutoEs 21 are journaled in the bearings 22 on the outside of the magazines and have theirv lower ends-connected by the links 23 to a rock shaft 24, which latter lare connected to one end of the eccentric rods 19. The movement, or rather the stroke, ofthe cut-OES can be regulated by'the lever 25 to change the position of thev shaft 24 'on the eccentric rod 19'. The power shaft 26 is provided with the worms 27, 27 which mesh with the gear wheels 20 on the outer ends of thereonveyers 9, by means of which the latter are operated. The power shaft 26 is also provided with a worm 28 in mesh with the gearwheel 29, which latter is mounted on the end `of the shaft 30. This shaft`30 is provided with a sprocket-wheel 31 on one end connected by the chain 32 to the sprocket 33 on the outer end of the conveyer 14 by means of which the latterV is operated. `The shaft 30 is connected to a shaft on the tender by means of a double universal joint 34,. This shaft on the tender is composed of two sections 35 and 36 connected by a sleeve 37 lin which the ends of the saidsections 35 and 36 are free to move longitudinally. The universal joint 34 permits of any movement of the engine and tender without interfering with the revolution of saidshaft. On one Y 'The operation of the device is as follows:

The fuel being loaded into the tender 13, and the power shaft 26 started, the fuel will` befcarried by the conveyer 15 tothe conveyer14 and from thence to the hopper 10, from which latter point it feeds to the two magazines 1, 1, and is carried by the conveyers 9, 9 back into themagazines and fed 'through the outlets 4, 4, to the fire-box as .heretofore described. t

While I have shown and described my invention applied to a locomotive, it is obvious'v the same-is applicable to any type of furnace. 1

`Having' thus described my invention, what Tclaimis:

1. In an underfeed furnace, the combination of a fire-box provided with a fuel'supend of the shaft 36 is a sprocket 'wheel 38 port, a magazine within said {ire-box having a discharge outlet at the top thereof, and spiral grooves or corrugations beginning near one side of said outlet and extending around and increasing in depth to the opposite side of said outlet, and a screw conveyer within said magazine adapted to be revolved in the direction of the increase of depth of the said grooves or corrugations.

2. In an underfeedfurnace, the combina- 'tion of a fire-box provided with a fuel supcation with said magazine, a screw conveyer within said magazine and projecting into said hopper, adapted to be revolved fin the direction of the increase of depth of the said grooves or corrugations, and means for operating said conveyer.

3. ln an underfeed furnace, the combination of a fire-box provided with a fuel support, a magazine within said fire-box having a discharge outlet to the fire-box, and spiral grooves or corrugations beginning near one side of said outlet and extending around and increasing in depth to the oppositeside of said outlet, each successive groove or corrugation decreasing in width toward the rear of said magazine, and a screw conveyer within said magazine, the flights of which decrease in size toward the rear end thereof, said oonveyer being adapted to be revolved in the direction of the increase of depth of the said grooves or corrugations, and the spaces between. the successive flights decrease toward the rear end of said conveyer to correspond to the decreased width of the said grooves or corrugations. Y 4:. ln an underfeed furnace, the conibln'ation of a fire-box provided with a .fuel support, a magazine within said lire-box having a discharge outlet at the top thereof, and

' spiral groovesv or corrugations beginning near one side of sald outlet Aand extending y around and 'lncreaslngin depth to the opposite side of said outlet, a screw conveyer within said magazine, adapted to be revolved in the direction of the increase of depth ofthe said grooves or corrugations,

aplurality of'cut--olfs near one end of said magazine and adapted to be operated inl rugations.

a discharge outlet at the top thereof, and spiral grooves or `orrugations beginning nearone side of said outlet and extending around and increasing in depth to the op posite side of said outlet, a screw conveyer within said magazine, adapted to be revolved in the direction of the increase of dept-h of the said grooves or corrugations, a plurality of cut-offs near one end of Said magazine and adapted to be operated lin and out between the iights of Said conveyer, a hopper having communication with the said magazine and into which one end of said conveyer projects, and a plunger adapted to be voperated in and out of the said hopper between the flights of the said conveyer.

6. In an underfeed furnace, the combination of a fire-box provided with a fuel sup-` port, a plurality of magazines within said lire-box each having a discharge outlet to the fire-box, and each magazine having sov spiral grooves or corrugations beginning near one side of said discharge outlet and increasing in depth and terminating in their greatest depth at the opposite side of said outlet, a screw conveyer in each of said magazines adapted to' be revolved` in the direction of the increase of depth of the said grooves `or corrugations, a hopper having communication with said magazines, and means for operating said conveyers.

7. In' an underfeed furnace, the combination of a fire-box provided with a fuel support, a plurality of magazines' within said fire-box each having a discharge outlet to the fire-box, and each magazine having spiral grooves or corrugations beginning near one side of said discharge outlet and increasing in depth and terminating in their greatest depth at the opposite side of said outlet, each successive groove or corrugation decreasing in width toward the rear of said magazine, a screw conveyer in each of said magazines the flights of which decrease in size toward the rear end thereof,'and the space between each successiveflight of the conveyer decreases toward the rear end thereof to correspond with the said grooves or corrugations, said conveyers being adapted tol be revolved in the direction of the increase of depth of the said grooves or corln testimony whereof l aflix my signa- 'ture in presence of two witnesses.

WllLLAM H. H. STINEMANR 

